EP0736466A1 - Tubular belt conveyor - Google Patents
Tubular belt conveyor Download PDFInfo
- Publication number
- EP0736466A1 EP0736466A1 EP96201355A EP96201355A EP0736466A1 EP 0736466 A1 EP0736466 A1 EP 0736466A1 EP 96201355 A EP96201355 A EP 96201355A EP 96201355 A EP96201355 A EP 96201355A EP 0736466 A1 EP0736466 A1 EP 0736466A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- belt
- tubular
- conveyor
- pulley
- conveyor belt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
- B65G15/08—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration the load-carrying surface being formed by a concave or tubular belt, e.g. a belt forming a trough
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/04—Bulk
Abstract
A flat belt (1) is rolled up into a tubular shape in which material is wrapped and conveyed between a pair of pulleys (2). While the belt (1) is transformed from a tubular shape to a flat shape and vice versa, the belt passes through guide rollers (9) in guide frames (8). A dummy pulley (34) and expansion rollers (31) are provided while the belt (1) is transformed between tubular and flat shapes, thereby preventing the belt (1) from biasing or folding back.
Description
- The present invention relates to a tubular belt conveyor in which an endless conveyor belt is rolled up into a tubular form in which material is wrapped and conveyed.
- With respect to Figs. 4 to 7, a conventional tubular belt conveyor will be described, in which an
endless conveyor belt 1 is rolled out to a flat shape which is wound around a pair ofpulleys pulleys paths conveyor belt 12 pass throughopenings 5c in the middle of upper andlower chambers frames 5 fixed to supportframe 5 at a certain distance along a conveying direction between thepulleys belt 1 is roller up to a tubular form by a plurality of shape-maintainingrollers 6 around the opening 5c. - As shown in Fig. 4, in trough transforming sections "A", "A'", "B" and "B'" in which the
conveyor belt 1 is rolled up into a tubular shape from a flat shape wound on one of thepulleys pulleys conveyor belt 1 is guided byguide rollers 9 pivoted to a plurality ofguide frames 8 fixed toframes 7 which extend from the ends of thesupport frame 4. - As shown in Fig. 6, while the
conveyor belt 1 which is rolled out to a flat shape and rotates around therear pulley 3 is rolled up through theguide frames 8 of the trough transforming section "A", it enclosesmaterial 11 thrown from asupply hopper 10. Then, thebelt 1 passes through the upper opening 5c of each of the shape-maintainingframe 5 and is rolled out to a flat shape while it passes through theguide frame 8 in the trough transforming section "B". When thebelt 1 is rotated around thefront pulley 2, thematerial 11 is thrown onto areceiving hopper 12, and then, it is rolled up into a tubular shape again in the trough transforming section "A'" and passes through thelower opening 5c of theguide frame 5. It is rolled out to a flat shape in the trough transforming section "B'" and circulated around therear pulley 3. - The foregoing schematically mentions structure and operation of such a tubular belt conveyor. In the trough transforming section "B" of the
conventional conveyor belt 1, as shown in Fig. 7, to extend the centre and side edges of theunfolded conveyor belt 1 equally by pulling force of thefront pulley 2, an extension of the central line of thetubular belt 1 coincides with a top 2a of the outer circumference of thefront pulley 2 which contacts theconveyor belt 1 or is positioned lower than thetop 2a as mentioned in Japanese Patent Laid-Open Pub. No. 63-262320. - The arrangement of the
rear pulley 3 and theconveyor belt 1 in the trough transforming section "A" is horizontally symmetrical with those in the trough transforming section "B" (not shown). The trough transforming sections "A'" and "B'" are vertically symmetrical with the trough transforming sections "B" and "A" respectively (not shown). - In the foregoing conventional tubular belt conveyor, the
conveyor belt 1 which goes into the trough transforming section "B" is still tubular shape, and at the portion, the side edges of theconveyor belt 1 is not continuous, but is merely overlapped, thereby causing stresses of the side edges regardless of each other and lacking uniform distribution. Therefore, owing to slight twisting of theconveyor belt 1, difference in stress between the side edges occurs, thereby causing difference in elongation of the side edges, inclining U-shaped portion and deviating a flat belt to one side. - To avoid the disadvantages, an automatic centering roller is provided in the trough transforming section to prevent the belt from deviating sideward, but loads are also liable to be deviated or belt does not normally run by the automatic centering roller if the roller is damaged, thereby damaging the side edge of the
conveyor belt 1 to theguide frame 8 and folding back the side edge. - In view of the disadvantages in the prior art, it is an object to provide a tubular belt conveyor which prevents a conveyor belt from damaging the side edge of the belt and folding back if loads are deviated or a roller is damaged.
- According to the present invention, there is provided a tubular belt conveyor comprising: a pair of pulleys; an endless conveyor belt which is wound around the pair of pulleys, the belt being rolled up into a tubular shape in which material is conveyed; a plurality of guide frames for guiding the belt to transform it from a tubular shape to a flat shape and vice versa; a dummy pulley adjacent to one of the pulleys and parallel therewith; and a pair of expansion rollers for expanding the side edges of the conveyor belt at one of the guide frames opposite to the pulley.
- Depending on operation of detecting means for detecting sideward deviation of the belt, the deviation is corrected by automatic adjusting means.
- While the belt is transformed from a tubular shape to a flat shape and vice versa, the side edges of the belt are equally expanded sidewards and pressed upward or downward by the dummy pulley. Then, the belt is wound on the pulley, thereby preventing the belt from deviating sideward and folding back.
- The features and advantages of the invention will become more apparent based on detailed description of embodiments with respect to drawings wherein:
- Fig. 1 is a side elevational view of an embodiment of the invention;
- Fig. 2 is a top plan view of the same;
- Fig. 3 is an enlarged sectional view taken along the line VI-VI in Fig. 3;
- Fig. 4 is a schematic side elevational view of a conventional tubular belt conveyor;
- Fig. 5 is an enlarged sectional view taken along the line VIII-VIII in Fig. 4;
- Fig. 6 is a top plan view of the rear portion of the conventional tubular belt conveyor; and
- Fig. 7 is a side elevational view of the same.
- Figs. 1 to 3 illustrate an embodiment of the first invention. The same numerals are assigned to the same members as those in the prior art.
- In the embodiment, a
roller support 30 is fixed to the upper middle portion of theguide frame 8 adjacent to the tubular belt in the trough transforming section "B", and three pairs ofexpansion rollers 31 are provided in theroller support 30 to expand the side edges of theconveyor belt 1 which is being unfolded. Ashaft 32 on which theexpansion roller 31 is pivoted is fixed to theroller support 30 to increase an opening angle in a forward direction. Each of theshafts 32 may be fixed to theroller support 30, but the upper ends of all theshafts 32 are engaged around asupport shaft 33. Each of theshafts 32 as inclined as above may be fastened by a nut (not shown) which fits around thesupport shaft 33 and all theshafts 32 may be fixed, so that mounting angle of theexpansion roller 31 is adjustable. - Between the
foremost guide frame 8 and thepulley 2 in the trough transforming section "B", ahorizontal dummy pulley 34 is provided substantially in parallel with thepulley 2. Thedummy pulley 34 is pivoted on ahorizontal shaft 37 of a U-shapedpulley support frame 36, the middle lower surface of which is fixed to the upper end of avertical rotation shaft 35 rotatably mounted in the front end of theframe 7. Thedummy pulley 34 is rotated together with thepulley support frame 36 and therotation shaft 34 by automatic adjusting means 38 on theframe 7. - The automatic adjusting means 38 includes a motor; a reduction gear which comprises a worm, a worm wheel etc.; and a control device and automatically rotates the
dummy pulley 34 slightly as described below by operation ofdetecting means 42 for detecting sideward deviation of theconveyor belt 1. Between thepulley 2 and thedummy pulley 34, there are provided a pair ofsupport plates conveyor belt 1 are inserted at a certain space respectively. On the opposite surfaces of thesupport plates belt detecting sensors 41 which comprise light emitting elements 41a and light receiving elements 41b which act by blocking an optical path by theconveyor belt 1. Thesensors 41 constitute the detecting means 42 for detecting sideward deviation of theconveyor belt 1. By comparing the number of thesensors 41 which act in right and left parts, it can be detected in which direction and how wide theconveyor belt 1 deviates. For example, when theconveyor belt 1 deviates rightward (upper direction in Fig. 5), three of the fourright sensors 41 and only one of the fourleft sensors 41 act, so that it is detected that theconveyor belt 1 deviates rightward by onesensor 31. Based on the detection, to correct the deviation of theconveyor belt 1, thedummy pulley 34 is slightly rotated in a clockwise direction from a parallel position with the pulley as shown in a solid line to a position as shown in a two-dotted line in Fig. 2. Then, when theconveyor belt 1 passes on thedummy pulley 34, correcting force acts against theconveyor belt 1 to turn it in a direction perpendicular to a central axis of the dummy pulley, so that theconveyor belt 1 is returned to an original normal state as shown in the solid line in Fig. 2. - When the
conveyor belt 1 is returned to the original normal state, each two of the right and left forsensors 41 acts, so that it is detected by the detecting means 42 that theconveyor belt 1 is returned to the normal position. Based on this matter, thedummy pulley 34 is returned by the automatic adjusting means 37 to a position in parallel with thepulley 2 as shown by a solid line in Fig. 2, and thereafter, theconveyor belt 1 runs in a normal state. - The
numeral 43 denotes a pressing-up roller which is mounted to teeframe 7 to contact the lower surface of a returningpath 1b of theconveyor belt 1 between theforemost guide frame 8 and thepulley 2 in the trough transforming section "A'". - In this embodiment, when the
tubular conveyor belt 1 comes to the trough transforming section "B", the side edges of theconveyor belt 1 are expanded equally by theexpansion roller 31, and, then, after thebelt 1 is turned upward and transformed to a flat form, thebelt 1 is wound on thepulley 2, so that theconveyor belt 1 is prevented from deviation sideward and from turning back when thebelt 1 is wound on thepulley 2. - Preferably, the automatic adjusting means 37 may be provided for rotating the
dummy pulley 34 in a correcting direction depending on the deviation of theconveyor belt 1 as mentioned above. - The foregoing description relates only to the trough transforming section "B", but may be applied to the trough transforming section "B'" which is symmetrical with the trough transforming section "B" vertically and horizontally.
- The foregoing embodiment relates to a tubular belt conveyor by overlapping the inner circumferential surface of the side edge on the outer circumferential surface of the other side edge, but also may be applied to a tubular belt conveyor in which the side edges of the
conveyor belt 1 abut to each other or in which the side edges is close to each other. - One, two, four or more pairs of the
expansion rollers 31 may be provided. - The foregoing merely relates to preferred embodiments of the present invention, but various changes and modifications may be made by persons skilled in the art without departing from the scope of claims.
Claims (4)
- A tubular belt conveyor comprising:a pair of pulleys;an endless conveyor belt which is wound around the pair of pulleys, the belt being rolled up into a tubular shape in which material is conveyed;a plurality of guide frames provided with guide rollers for guiding the belt to transform it from a tubular shape to a flat shape and vice versa;a dummy pulley adjacent to one of the pulleys and parallel therewith; anda pair of expansion rollers for expanding the side edges of the conveyor belt at the guide frame adjacent to the tubular belt.
- A tubular belt conveyor as defined in Claim 1 wherein the dummy pulley is rotatably mounted on a shaft perpendicular to an axis of the belt and the conveyor further comprises detecting means for detecting sideward deviation of the belt; and automatic adjusting means for rotating the dummy pulley on the shaft to correct the deviation automatically based on operation of the detecting means.
- A tubular belt conveyor as defined in Claim 2 wherein the detecting means comprises several pairs of photoelectric belt detecting sensors which comprise light-emitting and light-receiving elements which act by blocking optical paths by the belt, it being detected in which direction and how wide the belt deviates by comparing how many numbers the right and left sensors act.
- A tubular belt conveyor as defined in Claim 2 wherein the automatic adjusting means includes a motor; a reduction gear which comprises worm and worm wheel; and a control device.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP194633/93 | 1993-08-05 | ||
JP19463393A JP3227629B2 (en) | 1993-08-05 | 1993-08-05 | Pipe conveyor |
JP19463493A JP3227630B2 (en) | 1993-08-05 | 1993-08-05 | Pipe conveyor |
JP194634/93 | 1993-08-05 | ||
EP19940305606 EP0637556B1 (en) | 1993-08-05 | 1994-07-28 | Tubular belt conveyor |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94305606.9 Division | 1994-07-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0736466A1 true EP0736466A1 (en) | 1996-10-09 |
Family
ID=26508622
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96201355A Withdrawn EP0736466A1 (en) | 1993-08-05 | 1994-07-28 | Tubular belt conveyor |
EP19940305606 Expired - Lifetime EP0637556B1 (en) | 1993-08-05 | 1994-07-28 | Tubular belt conveyor |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19940305606 Expired - Lifetime EP0637556B1 (en) | 1993-08-05 | 1994-07-28 | Tubular belt conveyor |
Country Status (4)
Country | Link |
---|---|
EP (2) | EP0736466A1 (en) |
CN (1) | CN1045936C (en) |
CA (1) | CA2129311C (en) |
DE (1) | DE69407110T2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111646101A (en) * | 2019-11-27 | 2020-09-11 | 泰富重工制造有限公司 | Folding type bridge device for circular tube conveyor and installation method of folding type bridge device |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19821514C2 (en) * | 1998-05-13 | 2003-06-26 | Mesto Minerals Moers Gmbh | Guide roller unit for steep conveyors |
JP4613252B1 (en) * | 2010-05-07 | 2011-01-12 | 株式会社高井製作所 | Tofu continuous coagulation equipment |
DE102016212017A1 (en) * | 2016-07-01 | 2018-01-04 | Contitech Transportbandsysteme Gmbh | Pocket conveyor belt and pocket conveyor belt system |
CN107434143B (en) * | 2017-06-29 | 2019-11-29 | 宁德师范学院 | A kind of control method of pipe conveyer automatically deviation-adjusting device |
CN107344664B (en) * | 2017-06-29 | 2019-11-15 | 宁德师范学院 | A kind of pipe conveyer of automatic deflection adjusting |
CN107380945B (en) * | 2017-06-29 | 2019-04-26 | 宁德师范学院 | A kind of material conveyor pipe band deviation correcting device |
CN114524237B (en) * | 2022-03-14 | 2023-08-22 | 湖南立达环保科技有限公司 | Pipe belt conveyor capable of carrying uniformly |
CN115676241B (en) * | 2023-01-04 | 2023-03-21 | 太重集团向明智能装备股份有限公司 | Rubber belt anti-wrapping device of circular tube belt conveyor |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3429422A (en) * | 1967-02-02 | 1969-02-25 | Fuji Conveyor Kk | Belt conveyor |
GB2061853A (en) * | 1979-10-30 | 1981-05-20 | Hashimoto Kunio | A method and machine for conveying bulk material completely enclosed within a flexible tubular endless belt |
EP0058040A1 (en) * | 1981-02-09 | 1982-08-18 | Vladimir Furman | Installation for the transportation of bulk material between a shore and an offshore naval vessel |
US4402395A (en) * | 1981-02-18 | 1983-09-06 | Haruo Okazaki | Method and device for preventing a flexible tubular belt from twisting for use in a tubular belt conveyer |
US4527686A (en) * | 1982-01-18 | 1985-07-09 | Ricoh Co., Ltd. | System for correcting deflection of belt from its normal path of movement |
US4572417A (en) * | 1984-04-06 | 1986-02-25 | Eastman Kodak Company | Web tracking apparatus |
EP0301454A1 (en) * | 1987-07-30 | 1989-02-01 | Bridgestone Corporation | Twisting detecting and correction devices in a tubular belt conveyor |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4630726A (en) * | 1983-05-13 | 1986-12-23 | Haruo Okazaki | Tubular belt conveyor and a belt rolling up means of the same |
-
1994
- 1994-07-28 EP EP96201355A patent/EP0736466A1/en not_active Withdrawn
- 1994-07-28 EP EP19940305606 patent/EP0637556B1/en not_active Expired - Lifetime
- 1994-07-28 DE DE1994607110 patent/DE69407110T2/en not_active Expired - Lifetime
- 1994-08-02 CA CA 2129311 patent/CA2129311C/en not_active Expired - Fee Related
- 1994-08-05 CN CN 94108637 patent/CN1045936C/en not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3429422A (en) * | 1967-02-02 | 1969-02-25 | Fuji Conveyor Kk | Belt conveyor |
GB2061853A (en) * | 1979-10-30 | 1981-05-20 | Hashimoto Kunio | A method and machine for conveying bulk material completely enclosed within a flexible tubular endless belt |
EP0058040A1 (en) * | 1981-02-09 | 1982-08-18 | Vladimir Furman | Installation for the transportation of bulk material between a shore and an offshore naval vessel |
US4402395A (en) * | 1981-02-18 | 1983-09-06 | Haruo Okazaki | Method and device for preventing a flexible tubular belt from twisting for use in a tubular belt conveyer |
US4527686A (en) * | 1982-01-18 | 1985-07-09 | Ricoh Co., Ltd. | System for correcting deflection of belt from its normal path of movement |
US4572417A (en) * | 1984-04-06 | 1986-02-25 | Eastman Kodak Company | Web tracking apparatus |
EP0301454A1 (en) * | 1987-07-30 | 1989-02-01 | Bridgestone Corporation | Twisting detecting and correction devices in a tubular belt conveyor |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111646101A (en) * | 2019-11-27 | 2020-09-11 | 泰富重工制造有限公司 | Folding type bridge device for circular tube conveyor and installation method of folding type bridge device |
Also Published As
Publication number | Publication date |
---|---|
CN1102164A (en) | 1995-05-03 |
DE69407110D1 (en) | 1998-01-15 |
CA2129311A1 (en) | 1995-02-06 |
CA2129311C (en) | 2000-12-19 |
CN1045936C (en) | 1999-10-27 |
EP0637556A1 (en) | 1995-02-08 |
DE69407110T2 (en) | 1998-03-26 |
EP0637556B1 (en) | 1997-12-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP3208493B2 (en) | Straightening device for pipe conveyor | |
EP0736466A1 (en) | Tubular belt conveyor | |
US2729324A (en) | Horizontal turns for conveyers | |
US11046521B2 (en) | Curved conveyor | |
JP4477716B2 (en) | Twist correction device in pipe conveyor and pipe conveyor provided with the same | |
JPS5826708A (en) | Curved belt conveyor | |
EP0478433A2 (en) | Apparatus for orienting glass-sheets during their transport on a roller-conveyor | |
JP3227630B2 (en) | Pipe conveyor | |
FR2868760A1 (en) | DEVICE FOR CONVEYING A V-BELT TWICE AND A PULLEY OF FLOATING VOLTAGE | |
JP4308991B2 (en) | Article direction correction device | |
EP1616819A1 (en) | Booster device for pipe conveyor and pipe conveor device using the same | |
EP3529187B1 (en) | Device and method for sampling and deflection for blanks | |
JP4308971B2 (en) | Method for preventing twisting of a pipe conveyor having a curved portion | |
JPH08104411A (en) | Chain support device on slat conveyor | |
FR2756814A1 (en) | Transporter with type "C" flexible conveyor chains, for transferring e.g. packets up or down | |
JPH0825614B2 (en) | Automatic belt twist prevention device for pipe conveyor | |
KR20000014673U (en) | Meandering device of belt conveyor tension weight | |
JPH09100014A (en) | Automatic adjusting device for conveyor belt | |
JPH06305540A (en) | Automatic belt torsion preventive device of pipe conveyor | |
JP3337282B2 (en) | Meandering detection method and meandering adjustment method for cylindrical belt conveyor | |
JP3227629B2 (en) | Pipe conveyor | |
JPH08119424A (en) | Conveyor | |
EP0323953A1 (en) | Rapid handling system on sledges | |
JPS5957851A (en) | Conveyor centering device | |
JPH1191916A (en) | Roller conveyer |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19960518 |
|
AC | Divisional application: reference to earlier application |
Ref document number: 637556 Country of ref document: EP |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE GB IT |
|
17Q | First examination report despatched |
Effective date: 19970430 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19980508 |